Centrifugal turbine and similar pump.



J. 5. BROWN. GENTRIFUGAL, TURBINE, AND SIMILAR PUMP. APPLICATION FILED AUG. 19, 1905.

1 51 Patented 001;. 6,1914.

JOHN 3'. OF KEV? YO in". ASSIG uOR TO HENRY It VIORTHINGTUTLT, OF NEW YORK, N 1., ii. CORPORATION 0 NEW JERSEY.

CENTRIEUGAL, TE RBINE, AND SIMILAR PUMP.

ng the impellers so Jr: to expose equal surfaces to the pressure in the spaces on epposite sides of the impeller into which the delivery liquid passes around the edge f the impeller. It is found in pructice, hmve'rer, that impellers so constructed are not balanced, and that it is diiiicult and expensive to pro- Vide satisfactory means i 01 preventing the end thrust, because it cannot be determined before trial upon in ch side of pcllers the total. in-tesure will b... being practicrill impossible to unuiui'zictnre u: orni running con the spaces on the opposite sides 0;- closed impeller. Iiloreover, Wear causes result in changes in these 1 during use, so that a pump in which, '1

new, theend thrust is ii certain. amo nt Alli/t in one direction, will change in mnouut o:

endv thrust and may even have the en-rl t in the opposite direction after consider. use. I avoid these difiiculties and pump in which the impeller or ii be balanced c nveniently and e under all changes of running ccud I I making the impeller outs is the running joint of larger radius on one suite than the other, so that there shall be a constunt e of pressur on one side of the i ipell in the side/spaces, under all runnir conditions, and then oppose this constant excess of Patented 6, 1914.

Klo. 274,908.

at re by a reguli-itecl pressure from an source, lei-ably by admitting to e lltili llCli chamber .on the back the impeller. l 4 l l'itbl r circulate l i l balancing liquid b when the impeller bearing surfaces on the rear side of the imllei s to secure to some extent the effect l bearing, and thus reduce largely in and Wear in the pump.

3r mpanying drawings forming a pecification, the invention is 1 F pump of a Well-known type, and this ccnstriicuion will now be described, and the i'eutun forming the invention then )cciiically pointed out, in the claims.

Ferris-1g to said drawings, in which pump houn in vertical central section taken longitudmally of the it is the pump casing having the suction i5 and delivery C, D the impeller carried by the shaft l3, and F the usual diffusing ring surrounding the impeller. The impeller D is shown :is ot a common inclosed type having the side walls 11 and vanes 12 extending between the side Walls, and on opposite sides oi. the impellers are chambers 13 which may be quite deep cl' iml'iers, as shown, or only shal l oetween the impeller mills and be (fai ing. These chambers extend irmu the outer edge of the impeller inward it; the running" l Which are forme be tween shoulders on the impeller and on the rusing. Instead of ln'alill'lg these-chambers 13 of the same redial dimensions, as usual, so that, the pressure surface in these chambers on opposite sides of the impeller is equal, I make the chamber on one side, and preferably the front or suction side oi the im peller, shown, of greater radial dimensions than that on the other side of the ii puller, so that 21 1211 surl'acc on 1m peller 1S exposed to the pressure in the chamber 13 on the suction side .(if the imright; in the drawings. i I oppose this pressure excess by pressure from outside source as f0lloWs:At the back of the impeller is a balancing chamber lira", n ssum;

impeller opposed to the civnsla. v ure n the other side thus h irurl. Such :1 ha "icin l 'Wlll'lf lll provision is liquid betwe'en bearin' J ictiur: {incl but *l CLiGIl shown, tl s chamhsr is rd by {he hearing surfaces 11 the hank incl of the impeller and the heel ring 14 anil the. space nul'sicle l hr: hearing s11 connected with the impeller by thmugh Lhs impeller. The liqu J. .3-. 19 thus pa 5 between the he to th s impeller and forms a; liq timi hmrin The form and size chamber 113 may be varied a cc rclin result desired, and for the a" ing' it is necessary only that the surface of the impeller expwsecl is pressure therein Shall be suflicienlz in press the llTlDUllzJ a 3' from the hearing ring; to L rinit j liqiiicl l0 pass liabween the impeller anal ring. The circul c mmh -r 16 is nnt cssrntizi but metal to sup- .mn'i thr pipe if) to chamber 15 only (i sing" ll I st-(mcl i'hzit impeller 03? ii HNlllZl-HUXQB pump may bcsimilarly formed hi secure an excess of pressure 011 one ship and balance this by pru IU'G from an out-- sirlu 8011]"8 on the opposite side, will to provide lhc liquiil lJ-GENl UZ ii desired The circulation of liquid from The (h her 15 lo the passng'rs l6 linlweern lhu h iring surfaces on the lmrlr. of thr impollsr and the bearing ring); 1 2- not only forms a liquid Miti-ilricliun henrii'ig im the im fiwllr-r but, as lhc pressure ml the liquid passing ijhruu, l lLllS annular space xm'irs with :is iiJ. y, the slight -flu-wise mm'exi'irn'l f rho im :1 uncl sr varying side n"? surf-s :uitm'naiirully varies ll'c: "{JlHSSlllG on the haul; of the iirpeller Thus-1 if ths rimming mmtlitions of the iiiipoller change so that the excess o'l pressure mares the impellsr toward the bearing ring Il ihis i'ill reduce the space between the ring anti the impeller and throttle the circulating liquid so as to increasc the pressure on the h ii of the impeller am thus hiilzmce tl iniwllsr under the new running cnnilitio Similarly, if excess of pressure on the back of the impuller mares the impeller away from the bearing; ring 1 I this will increase the Width the, narroi' space between the impeller incl iii a bearing ring 14; through which the circulating liquid passes, and reduce the :ilsc l near the shaft.

War (lll .lJ.l\ sldli LLLALL (in Alum). laimlmi n'iov zrment between the bail sing i such resistance :10 g at a small l-BVEZRgQ m1 farm 0r coils" but lhai fhe iippliczzuln gsnsr ally in i 1 o turbine similar pumps with incloseil impeller and may he emhorlieii in different forms 1. In "turbine or QlUTYL an. inclosed impeller hrwi ils 0u3- sirle surfacs exposed to delivery pressure 11 gar 0n the SllCl-lOIi side of l filer than on ill-f: other side to SR'BCl under is 1e mipeller. In a pinup an i r side surface expa larger on, the 3m impeller than on the other l0 secure a, constant excess of pressure on lhe suction side of the imprller, i1 ig-rmil i'niitioii with bearing disk on the opposite side ml the impeller having a clmmbrbetween itancl the impeller and an annular hearing inclosing the chamber, passages outside the bearing surface connecting with the impeller, and means for supplying liquid l9 said chamber under pressure to balance the excess of delivery pressure and form a liquid bearing for the impeller.

3. The cininbinutim'i with the inclnseo impeller l) llfllllg the chamber 13 on the she" tion side of the impeller of greater radius than on the oppos' 1:: side, bearing ring 14 on the hack of the impeller irmlosiiigr lmlrincing chamlic l5, openings 16 thr h the im pellrr mnnec'lxi 11g \hc impeller with. the space ouisirle the hearing X'lllQ. and means for supplyin g liquid. unclcr pressure to said baliiiicing chamber.

4. The :1 hinziticn with the inclosecl imprllrr D having the chamber 13 on the suc 'rin side of lhe impeller of grealrr mdius than on lll l op 'imsite side, bearing ring 14- on the hack of the impeller inclosing bill." lll'lClllg chz'imhsr l5, openin 16 through lllllb U u I 1 impeller connectiv the impeller with llzs amines with .e pressurs at pressure two subscn space cutsi JOHN J. BROWN.

(I. J" SAWYER, GRAv is, 

